醋 (cù) means 'vinegar' and is a common condiment in Chinese cuisine. It is one of the traditional seven daily necessities and appears frequently in cooking and food-related discussions. Beyond its literal meaning, 吃醋 (to eat vinegar) is a colloquial expression meaning 'to be jealous.'
吃饺子的时候我喜欢蘸醋。
chī jiǎozi de shíhòu wǒ xǐhuān zhàn cù.
I like to dip dumplings in vinegar when eating them.
做糖醋排骨需要放不少醋。
zuò tángcù páigǔ xūyào fàng bùshǎo cù.
Making sweet and sour ribs requires quite a bit of vinegar.
听说他女朋友和别人说话,他就开始吃醋了。
tīngshuō tā nǚpéngyǒu hé biérén shuōhuà, tā jiù kāishǐ chīcù le.
When he heard his girlfriend talking to someone else, he got jealous.